I raised my children thinking they'd care for me as I aged. Well, they're totally into their careers and certainly have "no time" for me. I don't have any grandchildren and don't expect to. I am married, but my husband and I haven't lived together for over a decade. We are close friends; he'll take out my garbage now and then, but accompanying me to a medical appointment? Pffft. And, he's in his 70's. I don't have any friends that I'm close to.
The problem is huge and ugly in our society. The loneliness and isolation is so, so painful. And doctors act like we all have a large and devoted family to care for us.
My heart goes out to you, Macd.